llvm-project

4b939beb - Reapply "[CGObjC] Allow clang.arc.attachedcall on -O0 (#164875)" (#177285)

Reapply "[CGObjC] Allow clang.arc.attachedcall on -O0 (#164875)" (#177285) This reverts commit 8eac375a4bff84f0a10a9c8ee23c4da409a805f9. A unit test needed to be updated, that was all. I do not have merge permissions.